Bio Drain Treatment Sprayer Kit for fats, oils, and grease – FOG. Kit comes with heavy-duty, one gallon sprayer and one 12oz bottle of FOG concentrate. Mixing concentrate with water in 1-gallon sprayer for proper ratio to treat floor drains. FOG formula applied directly to drains will help reduce odors and maintain free-flowing drain lines. Daily spraying of floor drains will improve biological remediation of grease build up and reduce floor drain clogging over time. Refill of FOG 12oz concentrate sold separately in cases of 6.